REPORT DOCUMENTATION PAGE

Form Approved

OMB No. 0704-0188

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1.  AGENCY USE ONLY  (Leave blank)

2.  REPORT DATE

3/8/06

3.  REPORT TYPE AND DATES COVERED

Final Report 12-SEP-02 to 11-MAR-06

4.  TITLE AND SUBTITLE

Spacecraft Charge Monitor

NASA Phase II SBIR Contract Final Report

5.  FUNDING NUMBERS

C-NAS10-02038

6.  AUTHORS

Luke Goembel

7.  PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)

Goembel Instruments

1020 Regester Avenue

Baltimore, MD 21239-1515

8.  PERFORMING ORGANIZATION  REPORT NUMBER

2001-P2-FINAL

9.  SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)

National Aeronautics and Space Administration

Nasa Procurement Office/Mail Code: OP-OS

Kennedy Space Center, FL 32899

10. SPONSORING/MONITORING AGENCY REPORT NUMBER

11. SUPPLEMENTARY NOTES

12a. DISTRIBUTION/AVAILABILITY STATEMENT

No restriction on distribution.

12b. DISTRIBUTION CODE

13. ABSTRACT  (Maximum 200 words)

There are now few options available for monitoring spacecraft charge. An inexpensive, compact, reliable, easily deployed spacecraft charge monitor is needed. Goembel Instruments has developed just such an instrument - the Spacecraft Charge Monitor (SCM). In Phase I we built and tested a prototype SCM. Results from Phase I show that the SCM will revolutionize the field of spacecraft charge detection. The ~650 gram, 3 Watt, instrument will be able to determine spacecraft floating potential to within 0.1 volt for each second in flight. The SCM's performance represents an order of magnitude improvement over what is available now. In Phase II we advanced the SCM from laboratory prototype to flight prototype. We built flight-worthy SCM, calibrated the instrument, put it through a series of tests for flight worthiness, and delivered the fully tested flight instrument and documentation to NASA. The Phase II produced an SCM for use in space. The work done in Phase II has prepared us for the production of more flight instruments and the eventual flight of the SCM delivered to NASA will prove the utility of the SCM.

14. SUBJECT TERMS

Spacecraft Charging, Electron Spectroscopy, Spacecraft Instrumentation, SBIR.

15. NUMBER OF PAGES

35

16. PRICE CODE

17. SECURITY CLASSIFICATION OF REPORT

UNCLASSIFIED

18. SECURITY CLASSIFICATION OF THIS PAGE

UNCLASSIFIED

19. SECURITY CLASSIFICATION OF ABSTRACT

UNCLASSIFIED

20. LIMITATION OF ABSTRACT

UL